This You Tube video is from the Tonight Show with Jimmy Fallon, the Roots and the Sesame Street gang. Grover is a monster who is soft, cute and furry. He is known as someone who does not use any contractions when talking or singing.
Blogfinger finds a mascot: It’s Grover from Sesame Street (the Muppet in blue)
April 19, 2014 by Blogfinger
Grover is the blue one. (Elmo is the red one)